Soak the Chipotles in very hot water until soft, then wash them well with hot water.
Remove most of the seeds (depending on how hot you like it).
Slice the Chipotles fairly fine, cover with clean water, bring to a boil uncovered, allow them to simmer for apprx 4 hours or until the are very soft. If they begin to get dry add a bit more water. When cooked drain.
In a separate pot add remaining ingredients (except onions) to the vinegar, bring to a boil, simmer apprx 10 minutes.
Fry the onions in the oil until quite soft (10 minutes), add to the cooked Chipoltles.
Stir in the vinegar & spices, boil for a further 20 minutes.
Liquid.

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Nutrition Facts

Per Serving Per 100 g

Amount Per 1 Serving
Calories	198.1 Kcal (829 kJ)
Calories from fat	43.31 Kcal
		% Daily Value*
Total Fat	4.81g	7%
Sodium	16.86mg	1%
Potassium	288.09mg	6%
Total Carbs	37.74g	13%
Sugars	26.51g	106%
Dietary Fiber	4.55g	18%
Protein	2.22g	4%
Vitamin C	19.2mg	32%
Iron	1.1mg	6%
Calcium	65.9mg	7%

Amount Per 100 g
Calories	88.99 Kcal (373 kJ)
Calories from fat	19.46 Kcal
		% Daily Value*
Total Fat	2.16g	7%
Sodium	7.57mg	1%
Potassium	129.42mg	6%
Total Carbs	16.95g	13%
Sugars	11.91g	106%
Dietary Fiber	2.04g	18%
Protein	1g	4%
Vitamin C	8.6mg	32%
Iron	0.5mg	6%
Calcium	29.6mg	7%

* Percent Daily Values are based on a 2000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.
Find out how many calories should you eat.